JP2009226549A - Boring device for bowling ball - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boring device for a bowling ball can firmly clamp the bowling ball while suppressing cost. <P>SOLUTION: The boring device is provided with a ball placement table 2 for placing the bowling ball B, a fixing device 3 for fixing the bowling ball B placed on the ball placement table 2, and a drill 60 for boring the bowling ball B fixed by the fixing device 3. The fixing device 3 is provided with a pair of clamp arms 30, 31 for pressing the bowling ball B and a hydraulic cylinder 34 operating the clamp arms 30, 31. The bowling ball pressing direction of the clamp arms 30, 31 is set to pass through approximately the center of the bowling ball B placed on the ball placement table 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hole processing apparatus for a bowling ball for forming a thumb hole (thumb insertion hole), a finger hole (finger insertion hole), and a balance hole for weight balance adjustment on a ball used in a bowling game.

  A bowling ball hole drilling apparatus performs a process of drilling a hole in a fixed bowling ball with a drill of a drilling machine. At this time, it is important to firmly fix a heavy and hard ball in order to increase the processing accuracy. In other words, the bowling ball to be drilled does not shake even when subjected to considerable impact or vibration by the drill, and it is firmly fixed even if the positional relationship between the drill and clamp changes by changing the angle of the ball in the fixed state It is important to. if. If the fixing by the clamp is insufficient, the position of the hole may be slightly shifted or the size may be changed. And if the bowling ball can be firmly fixed, the thumb hole and finger hole desired by the bowler can be formed in the bowling ball, and the double drill that makes the thumb hole and finger hole almost elliptical can be easily processed. be able to.

  Thus, it is very important for the bowling ball hole drilling apparatus to fix the bowling ball firmly, and as a fixing apparatus for fixing the ball of the conventional hole drilling apparatus, as described in Patent Document 1, It is known that a bowling ball placed on an O-ring such as rubber is sandwiched between a pair of clamp arms. In the conventional bowling ball hole drilling apparatus having such a configuration, the pinching force by the pair of clamp arms increases in accordance with the pinching force of the pair of clamp arms, so that the pinching force is increased by the clamp arm without increasing the cost. Was naturally limited.

Japanese Patent No. 3553123

  An object of the present invention is to provide a bowling ball hole drilling apparatus that can solve the above-described conventional problems and can firmly clamp the bowling ball while suppressing cost.

  In order to solve the above problems, the present invention provides a ball mounting table for mounting a bowling ball, a fixing device for fixing the bowling ball mounted on the ball mounting table, and drilling the bowling ball fixed by the fixing device. In a drilling device for a bowling ball having a drill, the fixing device operates between a pair of clamp members for pressing the bowling ball and a position for clamping the bowling ball and a position for releasing the clamp. A bowling ball hole drilling device is provided, characterized in that the bowling ball pressing direction of the clamp member passes through substantially the center of the bowling ball mounted on the ball mounting table.

The present invention is effective when the operating means of the fixing device includes a hydraulic cylinder that operates the pair of clamp members.
Furthermore, the present invention is effective when it has circular ring-shaped members arranged on two concentric cores that are in contact with the ball on which the ball mounting table is mounted, and horizontally.

Furthermore, the present invention is effective when the two circular ring-shaped members are made of an elastic material.
Furthermore, according to the present invention, the pair of clamp members are symmetrical, and the pressing directions toward the center of the bowling ball when the clamp members are pressed are FL and FR, and two circles are formed from the center of the bowling ball. When the direction toward the center of the ring-shaped member is FC, it is effective that the angle formed by FL and FR, FC and FL, and FR and FC is set to approximately 120 degrees.

  According to the configuration of the present invention, it is possible to provide a bowling ball hole drilling device that can obtain a strong clamp by efficiently using the pressing force of the clamp member.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic view showing a bowling ball drilling apparatus according to the present invention.
In FIG. 1, a bowling ball hole drilling device 1 includes a ball mounting table 2 for mounting a bowling ball B, a fixing device 3 for fixing the bowling ball B mounted on the ball mounting table 2, and the ball mounting table 2. And a drilling machine 6 having a drill 60 for making a hole in the bowling ball B fixed to the machine. The fixing device 3 is provided with a pair of clamp arms 30 and 31 as clamp members, and the clamp arms 30 and 31 are each mounted so as to be rotatable around a shaft 32 in the intermediate region thereof, and at the tip, that is, the upper end in the figure. Is provided with a clamp piece 33 for clamping to the ball. The clamp piece 33 of the present example is substantially rectangular with the horizontal direction as the longitudinal direction, is bent along the diameter of the ball, does not damage the surface of the ball on the surface in contact with the ball, and increases the gripping force. A sheet of such a material, for example, a rubber sheet is attached.

  The lower ends of the clamp arms 30 and 31 are attached to a hydraulic cylinder 34 that is slidably mounted in the horizontal direction as the operating means. Specifically, the clamp arm 30 is pivotally supported by the piston rod 34a of the hydraulic cylinder 34, and the other clamp arm 31 is pivotally supported by a connecting member 34c integrated with the cylinder 34b.

  As shown in FIG. 1, the ball mounting table 2 and the fixing device 3 are supported by an XY table 4 provided on the base 7 of the hole processing device 1, and operate the handles 41 and 42 to operate the X axis. , The alignment can be moved along the Y axis. On this XY table 4, an angle table 5 is provided which can change the angle of the ball B while the bowling ball B is fixed to the ball mounting table 2, and the position of the ball with respect to the drill 60 can be adjusted. In FIG. 1, reference numeral 8 denotes a hydraulic unit that operates the hydraulic cylinder 34, and 9 denotes a support column that supports the drilling machine 6.

  The bowling ball hole drilling device 1 configured as described above places a bowling ball B that opens a finger hole or the like on the ball mounting table 2, and presses the placed bowling ball B with the clamp arm 31 of the fixing device 3. And fix. Then, by operating the drilling machine 6, a thumb hole or finger hole having a predetermined size can be formed at a predetermined position by the drill 60. At this time, if the fixing device 3 is not sufficiently fixed, the position of the hole may be slightly shifted or the size may be changed. Therefore, the bowling ball B is required to be firmly fixed.

Therefore, in the present invention, the following measures are taken to meet this requirement.
In the ball mounting table 2, as shown in FIGS. 2 and 3, the frame 20 supports a ball receiver 21 in which a hemispherical recess is formed, and the ball receiver 21 includes a hemispherical recess and a center. Two circular rings 22 and 23 as two circular ring-shaped members having different diameters are attached. The circular rings 22 and 23 are made of an elastic material such as rubber and protrude upward from the surface of the ball receiver 21, so that the ball B placed on the ball mounting table 2 hits only the circular rings 22 and 23. Touch. In addition, as a circular ring-shaped member, the circular ring may have a part or a plurality of parts separated.

  In the ball mounting table 2 configured as described above, the mounted bowling ball B is held in contact with the double circular rings 22 and 23. Therefore, the placed ball is well placed, and there is some error in the diameter of the bowling ball, but such error can be absorbed and all the placed balls can be stabilized.

  When the hydraulic cylinder 34 is operated by turning on a switch (not shown) in the fixing device 3, the piston rod 34a extends, the clamp arm 30 rotates to the center of the shaft 32, and the clamp piece 33 at the tip of the ball B 3, the hydraulic cylinder 34 moves to the right in FIG. 3, the clamp arm 31 rotates, and the clamp piece 33 comes into contact with the ball B. As a result, the ball B is clamped. At this time, the direction of the pressing force of the left and right clamp arms 30 and 31 is set to pass through substantially the center C of the ball B as indicated by arrows FL and FR. That is, the length of the pivot fulcrum of the clamp arms 30 and 31 is such that the direction in which the clamp pieces 33 of the clamp arms 30 and 31 are pressed toward the center C of the ball B.

  In the bowling ball hole drilling device constructed in this way, the pressing force of the clamp arms 30 and 31 is directed toward the center of the ball and the magnitude of the force becomes FL = FR = FC, so that the force in the other direction Even if is added, the bowling ball B, which is a sphere, can be firmly pressed down without causing blurring or the like without increasing the pressing force.

  Furthermore, as shown in FIG. 4, when the direction from the center C of the bowling ball B toward the centers of the two circular rings 22 and 23 is FC, the pressing direction FL of the pair of clamp arms 30 and 31 that are symmetric is left and right. , The angle between FL and FR, FC and FL, and FR and FC is set to approximately 120 degrees.

  With this configuration, the FC pressing force can be efficiently and maximized from the center C of the bowling ball B by the pressing force of the clamp arms 30 and 31, so that the ball B is securely pressed against the circular rings 22 and 23. Can be fixed. Therefore, as described above, even if there is a slight error in the diameter of the bowling ball B, the bowling ball B can be reliably fixed by flexibly corresponding to the outer diameter of the ball.

It is a side view of the hole processing apparatus of the bowling ball concerning the present invention. It is an enlarged view which shows the fixing device of the hole processing apparatus of the bowling ball. (A), (b) is the plane and sectional drawing of a ball mounting part. It is explanatory drawing which shows the relationship between a bowling ball, a clamp arm, and a circular ring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hole processing apparatus of a bowling ball 2 Ball mounting base 3 Fixing apparatus 21 Ball receiver 22, 23 Circular rings 22, 23
30, 31 Clamp arm 34 Hydraulic cylinder 60 Drill B Bowling ball C Center of bowling ball FL, FR Direction of clamp arm pressing force FC Direction from center of bowling ball to center of circular ring

Claims (5)

A bowling ball hole drilling device comprising: a ball mounting table for mounting a bowling ball; a fixing device for fixing the bowling ball mounted on the ball mounting table; and a drill for drilling a bowling ball fixed by the fixing device. In
The fixing device includes a pair of clamp members for pressing the bowling ball; and an operating means for operating the clamp member between a position for clamping the bowling ball and a position for releasing the clamp;
A bowling ball hole drilling apparatus, wherein a bowling ball pressing direction of the clamp member passes through a substantially center of the bowling ball mounted on the ball mounting table.   2. The bowling ball drilling apparatus according to claim 1, wherein the operating means of the fixing device includes a hydraulic cylinder that operates the pair of clamp members.   2. The bowling ball hole drilling apparatus according to claim 1, wherein the ball mounting base has circular ring-shaped members arranged on two large and small concentric cores that are in contact with the ball on which the ball mounting table is placed, and horizontally with respect to each other. A hole drilling device for bowling balls.   4. The bowling ball drilling apparatus according to claim 3, wherein the two circular ring-shaped members are made of an elastic material.   2. The bowling ball hole drilling apparatus according to claim 1, wherein the pair of clamp members are symmetrical, and the holding directions toward the center of the bowling ball when holding the clamp members are FL, FR, and the bowling ball Bowling characterized in that the angle between FL and FR, FC and FL, and FR and FC is set to approximately 120 degrees, where FC is the direction from the center to the center of the two circular ring-shaped members. Ball hole drilling device.

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